The equivalent expression to the sale price of an item is 0.8p, where p is the price of the item.
Solution:
Given that store is having a 20% off sale
The sale price of an item with price p is p – 0.2p
To find: Equivalent expression
Given expression is:
Sale price = p - 0.2p
Where "p" is the price of item
Let us simplify the given expression for sale price to find the equivalent expression
Sale price = p - 0.2p
Factor out p from above expression
Sale price = p( 1 - 0.2)
Sale price = p(0.8)
Thus, sale price = 0.8p
Thus the equivalent expression is 0.8p